A point charge Q = -12 ? C, and two other charges, q 1 and q 2 , are placed as s

Question

A point charge Q = -12 ? C, and two other charges, q1 and q2, are placed as shown. The electric force components on charge Q are Fx = +0.005 N and Fy = -0.003 N.


In Fig. 21.3, the number of excess electrons in charge Q is closest to:

A. 5.5 x 1013

B. 7.5 x 1013

C. 8.5 x 1013

D. 9.5 x 1013

E. 6.5 x 1013

A point charge Q = -12 ? C, and two other charges, q1 and q2, are placed as shown. The electric force components on charge Q are Fx = +0.005 N and Fy = -0.003 N. In Fig. 21.3, the number of excess electrons in charge Q is closest to: 5.5 times 1013 7.5 times 1013 8.5 times 1013 9.5 times 1013 6.5 times 1013

Explanation / Answer

B. 7.5 x 1013

n = 12*10^-6/1.6*10^-19 = 7.5*10^13 electron

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